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Numerical simulation of NO production in a pulverized coal fired furnace

Straka R., Makovička J., Beneš M.

Environment Protection Engineering

2011

Vol. 37, nr 2

13-22

Behaviour of air-coal mixture has been described using the Navier-Stokes equations for the mixture of air and coal particles, accompanied by the turbulence model. The undergoing chemical reactions are described by the Arrhenius kinetics (reaction rate proportional to exp(-E/RT) ). Heat transfer via conduction and radiation has also been considered. The system of partial difference equations is discretized using the finite volume method and the advection upstream splitting method as the Riemann solver. The resulting ordinary differential equations are solved using the 4th order Runge-Kutta method. Results of simulation for typical power production level are presented together with the air staging impact on NO production.

Riemann integrability and quasi-uniform convergence

Ger R., Jędrzejewski J.

Scientific Issues of Jan Długosz University in Częstochowa. Mathematics

2010

Vol. 15

31--34

We consider quasi-uniform convergence of sequences of functions in a context of Riemann integrability of its limit. Some generalizations are discussed as well.